The first year and a half of that dash's production didn't lend well to replacing bulbs. The driver information display backlight is the same way...not replaceable bulbs, just replace the assembly. Later to current models have changed and have replaceable bulbs for both, at least I believe this to be the case as well for the Warning Light Cluster. That was a "fun for the customer" learning curve for Prevost, and their trust that LED's are "life of the vehicle" lighting products. They are very susceptible to failure due to voltage transients Every notice how many cars on the road today have half the LED's in their LED tail light assembly out? Life of the vehicle....yeah, right lol.